System for transmitting variable conditions



Sept. 6, 1927. 41 197 V E. ROUCKA SYSTEM FOR TRANSMITTING VARIABLE CONDITIONS Filed Jan. 2, 1923 O O 8 2: 50 2! v n I 22 95 n o ATTORNEYS.

Patented Sept, 1927,.

. UNITED STATES 1,641,197 PATENT OFFICE.

narcn ROUOKA, or 3mm, czncnosnovaxu.

srsrnu res reansmrrme vaausrs conmrrons.

Applioati on fled January 2, 1928, Serial No. 610,388, and in Czechoslovakia. January 12, v.1922.

This invention relates to a system for transmitting variations in any quantity,

poses, the variations in the condition being transmitted at regular'intervals by means of an auxiliary power impulses or changes ofwhich are controlled by the variations in the condition, and the relation of said impulses or changes in the auxiliary energy to the said interval being a function of the condition and a measure therefor. The impulses of auxiliary energy affect a measuring, controlling or other suitable device.

The primary object of the invention is to provide such a system in which there is no reaction in the system as the result of the said impulses of auxiliary energy.

The invention consists in general of adevice sensitive to azquantity, quality or con. dition to be measured or transmitted, means for producing sudden changes or impulses of an auxiliary energy in accordance with the time positions of actuation of the said sensitive device in regular intervals, and a receiving means adapted to be actuated by said auxiliary energy for indicatingg etc. the said impulses and thereby measuring the quantit or quality.

In t e accompanying drawing I have shown one system embodying my invention, but it will be understood that this is only for the purpose of illustrating the principles of the invention and that many modifications and changes can be made in the detail construction and arrangement of the apparatus without departing from the spirit orv scope of the invention. y

In said drawings in which the same characters of reference indicate corresponding and like parts,

Figure 1 is a system embodying my invention, portions being broken away-for clearness in illustration; 1

Figure 2 is a diagrammatic side elevation of the means for producing impulses of the auxiliary energy;

Figure 3 is a front parts being omitted, and v Figure 4 is a side elevation of a rotary electric switch for determining the interval or period of the impulse of auxiliary energy.

Referring to the drawings, the reference elevation thereof, some diagrammatic illustration of character 6 desi ates a hydrometer or the like which is su merged in a liquid 4 in a container 2, the density of which liquid is to be transmitted ormeasured. The device 6 is connected by a flexible connection 8 to one end of a lever or hand 10 pivotally mounted intermediate its ends on a fixed support as at 12. This lever, or the portion 14 thereof, is capable of' displacement laterally in a direction at substantially right angles to the plane of its movement about the pivot 12. One end of said lever is provided with a portion 14 overlying a substantially U-shaped member 21, the arms of which are pivotally mounted on a fixed support as at. 25 and the intermediate portion 20 of which is segmental and substantially concentric with the pivot of the lever 10. Arranged above said portion 14 of the lever is a second U-shaped member 17 having its armsv also pivotally connected on a pivot 23 and having its intermediate portion 16 formed substantially concentric with the pivot: of the lever 10. The member 17 also carries a similar shaped member 24 whose arms are also pivotally connected at 23 and whose interme iate portion 18 is substantially concentric with the portion 16 of the member 17. The pivots'22, 23 and 25 are arranged. in superposed relation as shown in Figure .2. i

The member 17 carries a roller 28 which follows va cam 30 mounted on a shaft 32 driven through gearing 42 by a synchronous electric motor 44 connected to any suitable source of alternating current by wires 98. One comp'lete revolution of said cam constitutes one interval during which the impulse of auxiliary energy is produced. The cam 30 causes the member 17 to be swung about its pivot 22 toward and away from the portion 14 of the hand 10, and when the portion 16 of the member 17 engages said hand the latter is forced into engagement with the portion 20 of the member 21 which is thereby swung downwardly and actuates a switch mechanism for producing an impulse of auxiliary energy. The lower edge of the portion 16 is inclined at 160, as shown in Figure 3, and this inclined portion determines the time of actuation of the member 20 in an interval or period of operation of the member 17. As the portion 16 a proaches the portion 14 of the hand 10 t e member 18 engages the hand 14 and holds the same against further movement in either direction when engaged by the inclined edge 160 of the mem r 17.

The member is Provided with a projection 26 carrying an ad'ustable set screw 54 adapted to cooperate with a contact strip 62 of a switch for controlling the auxiliary energy which is shown as electricity. Said strip 62 is secured at one end to a fixed support and carries at its other enda contact point 52 adapted to cooperate with a contact point 50 on a second strip 64 also secured at one end to a fixed support and insulated from the strip 62. The strip 64 also carriesn contact point 48 adapted to cooperate with a fixed contact point 46. The

contact strip 62 is connected to one terminal of a source 95 of electric auxiliary energy, while the contact point 46 is connected to one of the brushes 40 of a rotary electric switch, shown in detail in Figure 4, and driven by the motor 44 synchronously with the cam 30.

This switch comprises a cylindrical body of-insulation 38 mounted on the shaft 32 and carrying a conducting segment 34 on Its periphery inelectrical contact with a cylindrical conducting portion 36 also mounted on the shaft 32 and rotatable therewith. The other brush 40 is in contact with the cylindrical conducting portion 36 and is connected to the ground at 94. The other terminal of the source 95 of auxiliary energy is connected through a recording device to the ground as at 92.

In the operation of the system so far described, the hand 10 assumes a positioncorresponding to the condition being measured, in the present instance the density of the liquid 4. During each revolution of the cam the portion 16 of the member 17 forces the hand 10 into engagement with the member 21 so as to close the contact 50, 52. At the same time the rotary switch is in a position so that one of the brushes contacts with the conducting portion 34 and completes the circuit of auxiliary energy from the source 95. An impulse of auxiliary energy is thus transmitted through the wire 96 to the recording instrument, and the duration of said impulse is determined by actuation of the strip 62 toward the strip 64, the circuit being broken by the contact 46, 48 after the strip 62 has been moved a predetermined distance toward the strip 64. A second impulse of auxiliary energy during the return of the contacts 46, 48 and 50, 52 to their. normal positions is prevented by the rotary switch 34, 36, which b .this time has been rotated to bring the insu ating portion 38 into engagement with the brush so as to break the circuit through the source of auxiliary energy.

Any suitable receiving or recording apparatus may be utilized, and for the urpose of illustration I have shown a synchronous motor 7 0 connected by wires 98 to the same source of current driving the motor 44, the said motor driving a cam 74 throu h suitable gearing 72. The rotation of tie cam 74 is thus synchronous with the operation of the cam 30. An indicating or recording lever 78 is pivotally mounted intermediate its ends on a fixed support at 80 and. carries at one end a roller 76 following thecam 74. The other end of said lever carries a recording pen 82 to cooperate with a movable record strip 102. The said recording pen is normally spaced from the record strip so as to produce no mark thereon. A second lever 84 overlies the lever 7 8 and is pivoted at one end as at 90, the said lever carrying an armature 86 cooperating with electromagnets 88 connected in circuit with the auxiliary energy.

In the operation of the receiving device, the pen 82 is oscillated transversely of the record strip by rotation of the cam 74, the positions of the pen corresponding to the positions of the member 17. On each im pulse of auxiliary energy, the magnets 88 are energized and attract the armature 86 to move the lever 84 against the recording lever 78, which action forces the pen 82 into en gagement with the record strip 100. The record thus consists of a curved line 102 made up of a plurality of dots each of which corresponds to a certain position of the lever 10.

With such a system it will be obvious that there is no reaction of the impulses of auxiliary energy on any part of the apparatus, and there is no tendency for the impulse producing mechanism to move the lever 10 out of its indicating position, so that the record produced is extremely accurate.

The present application is based particularly upon the transmitting apparatus, systems of this general type including both transmitting and receiving apparatus being disclosed in United States Patents No. 1,412,586 dated April 11, 1922, and No. 1,434,064 dated October 31, 1922. The receiving apparatus described in the present application is common to a number of apicants copending applications, and it is obvious that any suitable receiving appara tus may be used with the particular transmitting apparatus herein described.

Having thus described the invention, what I claim 15:

1. A system for transmitting variable conditions, comprising a member movable in accordance with variations in a variable condition to be measured or transmitted, a source of auxiliary energy, and means movable in cycles of regular intervals of time in a direction other than that of the movement of said movable member, said regularly movable means engagin said movable member at points in each 0 said cycles dependent upon the then magnitude of said condition to hold said member against movement under the influence of said condition and to cooperate with said member to produce an impulse of said auxiliary energy whereby the time position of said impulse in the interval of time of the corresponding cycle is a function of the magnitude of the condition at the moment of said impulse.

2. A system for transmitting variable conditions, comprising a member movable in accordance with variations in a variable condition to be measured or transmitted, a source of auxiliary energy, and means movable in cycles of regular intervals of time .in a directionother than that of the move ment of said movable member including a device to engage said movable member to temporarily hold the same against movement under the influence of said condition and a second device to engage said movable memher while the same is so held and at points in each of said cycles dependent upon the then magnitude of said condition to produce an impulse of said auxiliary energy whereby the time osition of said impulse in the interval of time of the corresponding cycle is a function of the magnitude of the conditionat the moment of said impulse;

3. A system for transmitting variable conditions, comprising a member movable in accordance with variations in a variable condition to be measured or transmitted, a source of auxiliary energy, means for controlling said auxiliary energy, and means movable in cycles of regular intervals of time in directions other-than those of the movement of said movable member to periodically hold said movable member against movement under the influence of said condition and tocooperate with said movable member at points in each of said cycles dependent upon the then magnitude of said condition to actuate said auxiliary energy controlling means to produce an impulse of said energy whereby the time position of said impulse in the interval of time of the corresponding cycle is a function of the magnitude of the condition at the moment of said impulse.

4. The system set forth in claim 1 in which the regularly movable means is operated in directions at substantially right angles to the lane of movement of said movable mem er.

5. The system set forth in claim2in which both said device for holding said movable member against movement andsaid device to cooperate with said movable member to produce an impulse of auxiliary energy are movable in directions at substantially. right angles to the plane of movement of said' 'rection other thanthatof the movement of said movable member for periodically engaging said movable member and including two members each provided with a surface for engaging said movable member, one of said members holding the movable member against movement under influence of said condition, the other of said members having its engaging surface inclined to the plane of movement of said movable member whereby the point in each of said cycles at which said last-mentioned member engages said movable member is dependent upon the then magnitude of said condition to produce an impulse of said auxiliary energy whereby the time position of said impulse in the interval of time of the corresponding cycle is a function of the magnitude of the condition at the movement of said impulse.

7. A system for transmitting variable conditions, comprising a member movable in accordance with variations in a variable condition to be measured or transmitted, a source of auxiliar energy, means for controlling said auxiliary energy, normally disengaged operating means for said controller having a portion disposedsubstantially parallel to the plane of movement of said movable member, means movable in cycles of regular intervals of time at the side of said movable member opposite said energy controlling means and in directions at substantially right angles to the plane of movement of said movable member including two mem bers each rovided with engaging surfaces for periodically engaging said movable member, one of said members operating to hold said movable member to said controller operating means to prevent further move ment of said movable member under the influence of said condition, the other of said members having its engaging surface in clined to the plane of movement of said member and operating to move said controller operating means to produce an impulse of said auxiliary energy at a point in each of said cycles dependent upon the then magni-' tude of said condition, whereby the time position of said impulse in the interval of time of the corresponding cycle is a function of the magnitude of the condition at the moment of said impulse.

ERICH ROUCKA. 

